Thermodynamic analysis of geothermal binary power system

Basing on mid-low-temperature heat resource, a power system is developed using the characteristic of low boiling non-azeotropic ammonia-water mixtures. This system may produce power using low temperature heat resource rang from 350-400K. The ammonia mass fraction of basic working liquid is 65%. Evaluated with the First Law of Thermodynamics, the simulation results show that the theoretical electrical efficiency is 10.4%. Additionally, the effect of turbine outlet pressure and heat resource temperature on the theoretical electrical efficiency is studied. The power system exploits a new way for utilizing the mid-low temperature heat resource efficiently.